Improvement in refining iron and steel



JAMES ATWOOD, OF PITTSBURG, PENNSYLVANIA.

Letters Patent No, 107,322, dated Septmnber 13,1870;

IMPROVEMENT IN nnrmme IRON AND STEEL.

The $chedu1a referred to in these Letters Patent and making part of thesame To all whom it may concern:

Be it known that I, J AMES E. ATWOOD, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have discovered a new and usefulChemical for Refining Iron and Steel; and I do hereby declare thefollowing to be a full, clear, and exact description thereof, snfiicientto enable others to make and use the same.

My discovery consists iii-mixing, in definite proportions, iodide ofpotassium with the carbons'and fluxes used in making cast-steel and inrefining iron.

In carrying out my discovery'I use the'following substances, in aboutthe proportions named: v

Ot' iodide of potassium, about fifteen grains; lampblaek or charcoal,about ten. ounces; manganese, about four ounces; iron, about eight-ypounds.

Theseare melted in a erucible' in the usual manner, and itwill be foundthat steel made from this compound will be superior in quality to thatmade in v the old English manner.

Having thus described my discovery, What I claim as new, and desire .tosecure byLetters Patent, isp I The combination of iodide of potassiumwith the carbons and fluxes used in the manufacture of iron and steel.j"

JAMES E. ATWOOD;

Witnesses:

J. G. BACKOFEN, ED. KRIEG.

